X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/cdd1b58b386da575f3c73ab94ae72e5e66be797b..c849a9f409e8b3cd5091dd8b674670850d7bd3b9:/IkiWiki/Plugin/highlight.pm

diff --git a/IkiWiki/Plugin/highlight.pm b/IkiWiki/Plugin/highlight.pm
index 117ab5898..fbe7ddff4 100644
--- a/IkiWiki/Plugin/highlight.pm
+++ b/IkiWiki/Plugin/highlight.pm
@@ -1,18 +1,23 @@
 #!/usr/bin/perl
 package IkiWiki::Plugin::highlight;
 
+# This has been tested with highlight 2.16 and highlight 3.2+svn19.
+# In particular version 3.2 won't work. It detects the different
+# versions by the presence of the the highlight::DataDir class.
+
 use warnings;
 use strict;
 use IkiWiki 3.00;
-use highlight;
+use Encode;
 
-# locations of highlight's files
-my $filetypes="/etc/highlight/filetypes.conf";
-my $langdefdir="/usr/share/highlight/langDefs";
+my $data_dir;
 
 sub import {
 	hook(type => "getsetup", id => "highlight",  call => \&getsetup);
 	hook(type => "checkconfig", id => "highlight", call => \&checkconfig);
+	# this hook is used by the format plugin
+	hook(type => "htmlizeformat", id => "highlight", 
+		call => \&htmlizeformat, last => 1);
 }
 
 sub getsetup () {
@@ -20,18 +25,52 @@ sub getsetup () {
 		plugin => {
 			safe => 1,
 			rebuild => 1, # format plugin
+			section => "format",
 		},
 		tohighlight => {
 			type => "string",
 			example => ".c .h .cpp .pl .py Makefile:make",
-			description => "source files to syntax highlight",
+			description => "types of source files to syntax highlight",
 			safe => 1,
 			rebuild => 1,
 		},
+		filetypes_conf => {
+			type => "string",
+			example => "/etc/highlight/filetypes.conf",
+			description => "location of highlight's filetypes.conf",
+			safe => 0,
+			rebuild => undef,
+		},
+		langdefdir => {
+			type => "string",
+			example => "/usr/share/highlight/langDefs",
+			description => "location of highlight's langDefs directory",
+			safe => 0,
+			rebuild => undef,
+		},
 }
 
 sub checkconfig () {
-	if (exists $config{tohighlight}) {
+	eval q{use highlight};
+	if (highlight::DataDir->can('new')) {
+		$data_dir=new highlight::DataDir();
+		$data_dir->searchDataDir("");
+	} else {
+		$data_dir=undef;
+	}
+
+	if (! exists $config{filetypes_conf}) {
+		$config{filetypes_conf}= 
+		     ($data_dir ? $data_dir->getConfDir() : "/etc/highlight/")
+			  . "filetypes.conf";
+	}
+	if (! exists $config{langdefdir}) {
+		$config{langdefdir}=
+		     ($data_dir ? $data_dir->getLangPath("")
+		      : "/usr/share/highlight/langDefs");
+
+	}
+	if (exists $config{tohighlight} && read_filetypes()) {
 		foreach my $file (split ' ', $config{tohighlight}) {
 			my @opts = $file=~s/^\.// ?
 				(keepextension => 1) :
@@ -50,7 +89,7 @@ sub checkconfig () {
 				id => $file,
 				call => sub {
 					my %params=@_;
-				       	highlight($langfile, $params{content});
+				       	highlight($langfile, $file, $params{content});
 				},
 				longname => sprintf(gettext("Source code: %s"), $file),
 				@opts,
@@ -59,39 +98,71 @@ sub checkconfig () {
 	}
 }
 
+sub htmlizeformat {
+	my $format=lc shift;
+	my $langfile=ext2langfile($format);
+
+	if (! defined $langfile) {
+		return;
+	}
+
+	return Encode::decode_utf8(highlight($langfile, $format, shift));
+}
+
 my %ext2lang;
 my $filetypes_read=0;
+my %highlighters;
 
 # Parse highlight's config file to get extension => language mappings.
 sub read_filetypes () {
-	open (IN, $filetypes);
-	while (<IN>) {
-		chomp;
-		if (/^\$ext\((.*)\)=(.*)$/) {
-			$ext2lang{$_}=$1 foreach $1, split ' ', $2;
+	my $f;
+	if (!open($f, $config{filetypes_conf})) {
+		warn($config{filetypes_conf}.": ".$!);
+		return 0;
+	};
+
+	local $/=undef;
+	my $config=<$f>;
+	close $f;
+
+	# highlight >= 3.2 format (bind-style)
+	while ($config=~m/Lang\s*=\s*\"([^"]+)\"[,\s]+Extensions\s*=\s*{([^}]+)}/sg) {
+		my $lang=$1;
+		foreach my $bit (split ',', $2) {
+			$bit=~s/.*"(.*)".*/$1/s;
+			$ext2lang{$bit}=$lang;
+		}
+	}
+
+	# highlight < 3.2 format
+	if (! keys %ext2lang) {
+		foreach (split("\n", $config)) {
+			if (/^\$ext\((.*)\)=(.*)$/) {
+				$ext2lang{$_}=$1 foreach $1, split ' ', $2;
+			}
 		}
 	}
-	close IN;
-	$filetypes_read=1;
-}
 
-sub langfile ($) {
-	return "$langdefdir/$_[0].lang";
+	return $filetypes_read=1;
 }
 
+
 # Given a filename extension, determines the language definition to
 # use to highlight it.
 sub ext2langfile ($) {
 	my $ext=shift;
 
+	my $langfile="$config{langdefdir}/$ext.lang";
+	return $langfile if exists $highlighters{$langfile};
+
 	read_filetypes() unless $filetypes_read;
 	if (exists $ext2lang{$ext}) {
-		return langfile($ext2lang{$ext});
+		return "$config{langdefdir}/$ext2lang{$ext}.lang";
 	}
 	# If a language only has one common extension, it will not
 	# be listed in filetypes, so check the langfile.
-	elsif (-e langfile($ext)) {
-		return langfile($ext);
+	elsif (-e $langfile) {
+		return $langfile;
 	}
 	else {
 		return undef;
@@ -101,18 +172,36 @@ sub ext2langfile ($) {
 # Interface to the highlight C library.
 sub highlight ($$) {
 	my $langfile=shift;
+	my $extorfile=shift;
 	my $input=shift;
 
-	my $gen = highlightc::CodeGenerator_getInstance($highlightc::XHTML);
-	$gen->setFragmentCode(1); # generate html fragment
-	$gen->setHTMLEnclosePreTag(1); # include stylish <pre>
-	$gen->initLanguage($langfile);
-	$gen->initTheme("/dev/null"); # theme is not needed because CSS is not emitted
-	$gen->setEncoding("utf-8");
+	eval q{use highlight};
+	if ($@) {
+		print STDERR gettext("warning: highlight perl module not available; falling back to pass through");
+		return $input;
+	}
+
+	my $gen;
+	if (! exists $highlighters{$langfile}) {
+		$gen = highlight::CodeGenerator::getInstance($highlight::XHTML);
+		$gen->setFragmentCode(1); # generate html fragment
+		$gen->setHTMLEnclosePreTag(1); # include stylish <pre>
+		if ($data_dir){
+			# new style, requires a real theme, but has no effect
+			$gen->initTheme($data_dir->getThemePath("seashell.theme"));
+		} else {
+			# old style, anything works.
+			$gen->initTheme("/dev/null");
+		}
+		$gen->loadLanguage($langfile); # must come after initTheme
+		$gen->setEncoding("utf-8");
+		$highlighters{$langfile}=$gen;
+	}
+	else {		
+		$gen=$highlighters{$langfile};
+	}
 
-	my $output=$gen->generateString($input);
-	highlightc::CodeGenerator_deleteInstance($gen);
-	return $output;
+	return "<div class=\"highlight-$extorfile\">".$gen->generateString($input)."</div>";
 }
 
 1